| Patent application number | Description | Published |
|---|
| 20090148139 | Method of Operating Drill with Solid State Speed Control - A method of operating a hand power tool in one embodiment includes generating a variable speed control signal with a solid state switch that corresponds to a selected speed for a motor, generating a pulse width modulated (PWM) signal corresponding to the variable speed control signal, generating H-bridge driving signals for an H-bridge circuit in correspondence with the PWM signal, and selectively coupling a motor to a power source using the H-bridge circuit in accordance with the H-bridge driving signals. | 06-11-2009 |
| 20100206429 | Modular Router With Base Sensor - A power tool comprises a base unit and a motor unit. The base unit includes a handle and a first electrical connector. The motor unit includes an electric motor and a second electrical connector. The motor unit is configured to be releasably connected to the base unit. An electrical connection is established between the first electrical connector and the second electrical connector when the motor unit is properly connected to the base unit. A sensor is configured to determine whether the motor unit is properly connected to the base unit. | 08-19-2010 |
| 20100206430 | Modular Router With Base Power Switch - A routing machine comprises a base unit and a motor unit releasably connected to the base unit. The base unit includes a handle and a first electrical connector. The motor unit includes an electric motor, motor control circuitry configured to energize or de-energize the electric motor, and a second electrical connector connected to the motor control circuitry. The second electrical connector is configured to engage the first electrical connector when the motor unit is properly seated on the base unit. An electric switch is positioned on the base unit. The motor control circuitry is configured to deliver electric power to the electric motor when the switch is in an on position. The motor control circuitry is configured to not provide electric power to the electric motor when the switch is in an off position. | 08-19-2010 |
| 20100206431 | Router Depth Adjustment Mechanism - A routing machine comprises a plunge post, an electric motor, and a motor housing slideably connected to the plunge post. The motor housing defines an upper surface. A lockpiece selectively engages the plunge post between a locked position and an unlocked position. The lockpiece is allowed to slide relative to the plunge post along with the electric motor and motor housing when the lockpiece is in an unlocked position. The lockpiece is configured to lock in place relative to the plunge post and limit the extent to which the electric motor and motor housing may slide relative to the plunge post when the lockpiece is in the locked position. A fine adjustment mechanism is moveably connected to the lockpiece. The fine adjustment mechanism is configured to move the electric motor and motor housing relative to the plunge post when the lockpiece is in the locked position. | 08-19-2010 |
| 20100206432 | Plunge Router Bearing - A routing machine comprises a first plunge post, a second plunge post, and an electric motor moveable on the routing machine relative to the first plunge post and the second plunge post. A first sleeve bearing is slideably positioned on the first plunge post with a first clearance defined between the first sleeve bearing and the first plunge post. The first sleeve bearing is configured to slide along the first plunge post when the electric motor moves relative to the first plunge post. A second sleeve bearing is slideably positioned on the second plunge post with a second clearance defined between the second sleeve bearing and the second plunge post. The second sleeve bearing is configured to slide along the second plunge post when the electric motor moves relative to the second plunge post. At least one flexible member extends from the second sleeve bearing toward the second plunge post. | 08-19-2010 |
| 20100206433 | Modular Router With Secondary Release Lever - A routing machine comprises a base unit and a motor unit, which is releasably connected to the base unit. The motor unit defines a motor axis is configured for insertion into the base unit substantially in the direction of the motor axis. A depth adjustment latch is provided on the base unit. A release latch is provided on the base unit. The release latch is moveable between a first position and a second position. The release latch is configured to provide a positive stop for the motor unit when the release latch is in the first position, such that the motor unit is blocked from release from the base unit while allowing the motor unit to move along the motor axis. The motor unit is free to release from the base unit when the release latch is in the second position. | 08-19-2010 |
| 20120024424 | Modular Router With Base Power Switch - A routing machine comprises a base unit and a motor unit releasably connected to the base unit. The base unit includes a handle and a first electrical connector. The motor unit includes an electric motor, motor control circuitry configured to energize or de-energize the electric motor, and a second electrical connector connected to the motor control circuitry. The second electrical connector is configured to engage the first electrical connector when the motor unit is properly seated on the base unit. An electric switch is positioned on the base unit. The motor control circuitry is configured to deliver electric power to the electric motor when the switch is in an on position. The motor control circuitry is configured to not provide electric power to the electric motor when the switch is in an off position. | 02-02-2012 |
